User's Guide
SLVUA93–September 2014
TPS62180EVM-581 Evaluation Module
This user’s guide describes the characteristics, operation, and use of TI's TPS62180 evaluation module
(EVM). The TPS62180EVM-581 (PWR581-001) facilitates the evaluation of the TPS62180 6-A, 2-phase
buck converter. The EVM outputs a 3.3-V output voltage from input voltages between 4 V and 15 V. The
TPS62180 features Automatic Efficiency Enhancement (AEE™) to deliver efficiencies in excess of 90%
across the load current range. The small solution size (99 mm2) and low profile possible enable a very
dense power solution in tablets, Solid State Drives (SSDs), and other portable devices. This user’s guide
includes setup instructions for the hardware, a printed-circuit board layout for the EVM, a schematic
diagram, a bill of materials (BOM), and test results for the EVM.
Contents
1 Introduction ................................................................................................................... 1
2 Setup .......................................................................................................................... 3
3 TPS62180EVM-581 Test Results ......................................................................................... 4
4 Board Layout ................................................................................................................. 5
5 Schematic and Bill of Materials ............................................................................................ 8
List of Figures
1 Thermal Performance (VIN = 15 V, Load = 6 A).......................................................................... 4
2 Loop Measurement (VIN = 12 V, Load = 6 A, 50-Ωresistor added in series with R1) .............................. 4
3 Assembly Layer.............................................................................................................. 5
4 Top Silk Layer................................................................................................................ 5
5 Top Layer..................................................................................................................... 6
6 Internal Layer 1 .............................................................................................................. 6
7 Internal Layer 2 .............................................................................................................. 7
8 Bottom Layer ................................................................................................................. 7
9 TPS62180EVM-581 Schematic............................................................................................ 8
List of Tables
1 Performance Specification Summary ..................................................................................... 2
2 TPS62180EVM-581 Bill of Materials...................................................................................... 9
1 Introduction
The TPS62180 is a 6-A, dual-phase, synchronous, step-down converter in a 2 × 3-mm, WCSP package.
Both fixed and adjustable output voltage units are available.
AEE is a trademark of Texas Instruments.
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Introduction
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1.1 Performance Specification
Table 1 provides a summary of the TPS62180EVM-581 performance specifications. All specifications are
given for an ambient temperature of 25°C.
Table 1. Performance Specification Summary
Specification Test Conditions Min Typ Max Unit
Input voltage 4 15 V
Output voltage setpoint 3.3 V
Output current 0 6 A
Soft-start time Ramp time of VOUT 825 µs
1.2 Modifications
The printed-circuit board (PCB) for this EVM is designed to accommodate the fixed output voltage version
of the integrated circuit (IC). Additional input and output capacitors can also be added. A lower profile
inductor may also be used to reduce the total solution height. Finally, the input voltage at which the IC
turns on can be adjusted with two resistors.
1.2.1 Fixed Output Voltage Operation
U1 can be replaced with the fixed output voltage version of the IC for evaluation. For fixed output voltage
version operation, replace R2 with a 0-Ωresistor and remove R1.
1.2.2 Input and Output Capacitors
C13 and C14 are provided for additional input capacitors. These capacitors are not required for proper
operation but can be used to reduce the input voltage ripple.
C7, C8, C9, C10, C11, and C12 are provided for additional output capacitors. These capacitors are not
required for proper operation but can be used to reduce the output voltage ripple and to improve the load
transient response. The total output capacitance must remain within the recommended range in the
TPS62180 data sheet (SLVSBB8) for proper operation.
1.2.3 Lower Profile Solutions
The TPS62180EVM-581 supports modifications to achieve a lower total solution profile (height). The
current EVM gives a maximum height of 2.1 mm. To obtain a lower profile solution, replace both inductors
L1 and L2 with a suitable inductor of lower height. An option is the DFE252012P series from Toko which
has a maximum profile of 1.2 mm. These inductors fit well on the existing pads for L1 and L2.
1.2.4 Configurable Enable Threshold Voltage
With JP1 removed, R4 and R5 can be installed to set a user-selectable input voltage at which the IC turns
on. See the equations in the data sheet for details of calculating the resistor values.
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Setup
2 Setup
This section describes how to properly use the TPS62180EVM-581.
2.1 Input/Output Connector Descriptions
J1 – VIN Positive input connection from the input supply for the EVM
J2 – S+/S– Input voltage sense connections. Measure the input voltage at this point.
J3 – GND Return connection from the input supply for the EVM
J4 – VOUT Output voltage connection
J5 – S+/S– Output voltage sense connections. Measure the output voltage at this point.
J6 – GND Output return connection
J7 – PG/GND The PG output appears on pin 1 of this header with a convenient ground on pin 2
J8 – SS/TR/GND The SS/TR pin voltage appears on pin 2 of this header with a convenient ground on
pin 1
JP1 – EN EN pin input jumper. Place the supplied jumper across ON and EN to turn on the
IC. Place the jumper across OFF and EN to turn off the IC. Remove the jumper to
set a configurable enable threshold voltage with R4 and R5.
JP2 – PG Pullup PG pin pullup voltage jumper. Place the supplied jumper on JP2 to connect the PG
Voltage pin pullup resistor to the output voltage. Alternatively, the jumper can be removed
and a different voltage can be supplied on pin 1 to pull up the PG pin to a different
level. This externally applied voltage must remain below 7 V.
2.2 Setup
To operate the EVM, set jumpers JP1 and JP2 to the desired positions per Section 2.1. Connect the input
supply to J1 and J3 and connect the load to J4 and J6.
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Frequency (Hz)
Gain (dB)
Phase (deg)
100 1000 10000 100000 1000000
-60 -180
-50 -150
-40 -120
-30 -90
-20 -60
-10 -30
0 0
10 30
20 60
30 90
40 120
50 150
60 180
D001
Gain
Phase
TPS62180EVM-581 Test Results
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3 TPS62180EVM-581 Test Results
The TPS62180EVM-581 was used to take the data in the TPS62180 data sheet (SLVSBB8). See the
device data sheet for the performance of this EVM.
Figure 1. Thermal Performance (VIN = 15 V, Load = 6 A)
Figure 2. Loop Measurement (VIN = 12 V, Load = 6 A, 50-Ωresistor added in series with R1)
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Board Layout
4 Board Layout
This section provides the TPS62180EVM-581 board layout and illustrations. The Gerbers are available on
the EVM product page: TPS62180EVM-581. Rev. B of the PCB just filled the vias under U1 to improve
manufacturability. No copper changes were made from Rev. A.
Figure 3. Assembly Layer
Figure 4. Top Silk Layer
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J1
J2
J3
J4
J5
VIN
4V to 15V
S+
S-
GND
GND
S+
S-
VOUT
JP1
ON
EN
OFF
C13
DNP
C8
DNP
3.3V
C7
DNP
TP1
DNP
6A
VIN
C9
DNP C10
DNP C11
DNP C12
DNP
J7
GND
PG
3300pF
C5
J8
SS/TR
GND
150k
R2
J6
C14
DNP
VIN
TP2
DNP
100µF
C6
JP2
470k
R1
470k
R3
L1
XFL4020-102MEB
L2
XFL4020-102MEB
22µF
C1
22µF
C2 47µF
C3
47µF
C4
1
2
R4
DNP
R5
DNP
VIN1
A1 SW1 A2
PGND
A3 VO A4
VIN1
B1 SW1 B2
PGND
B3
FB B4
VIN1
C1 SW1 C2
PGND
C3
AGND
C4
VIN2
D1 SW2 D2
PGND
D3
SS/TR D4
VIN2
E1 SW2 E2
PGND
E3
EN
E4
VIN2
F1 SW2 F2
PGND
F3 PG F4
U1
TPS62180YZF
Schematic and Bill of Materials
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5 Schematic and Bill of Materials
This section provides the TPS62180EVM-581 schematic and bill of materials.
5.1 Schematic
Figure 9 illustrates the TPS62180EVM-581 schematic.
Figure 9. TPS62180EVM-581 Schematic
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Schematic and Bill of Materials
5.2 Bill of Materials
Table 2 lists the BOM for this EVM.
Table 2. TPS62180EVM-581 Bill of Materials
Quantity Ref Des Value Description Size Part Number Manufacturer
2 C1, C2 22uF CAP, CERM, 22uF, 25V, +/-20%, X5R, 0805 GRM21BR61E226ME44L MuRata
0805
2 C3, C4 47uF CAP, CERM, 47uF, 10V, +/-20%, X5R, 0805 GRM21BR61A476ME15L MuRata
0805
1 C5 3300pF CAP, CERM, 3300pF, 25V, +/-10%, X7R, 0603 GRM188R71E332KA01D MuRata
0603
1 C6 100uF CAP, TA, 100uF, 20V, +/-10%, 0.5 ohm, 7343-43 293D107X9020E2TE3 Vishay-Sprague
SMD
2 L1, L2 1uH Inductor, Shielded, Composite, 1uH, 5.4A, 4x2x4mm XFL4020-102MEB Coilcraft
0.01 ohm, SMD
2 R1, R3 470k RES, 470k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07470KL Yageo America
1 R2 150k RES, 150k ohm, 1%, 0.1W, 0603 0603 RC0603FR-07150KL Yageo America
1 U1 TPS62180(1) 4 - 15V, 6A, 2-Phase Step-Down 2x3mm TPS62180YZF Texas Instruments
Converter
(1) The TPS62180EVM-581 may be populated with TPS62180 (U1) devices that do not contain the correct top-side markings on the top of
the device itself. These devices are still fully-tested TPS62180 devices and meet the specified electrical characteristics of the data sheet.
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